SU698947A1 - Raw mixture for producing autoclave silicate articles - Google Patents

Description

(54) RAW MATERIALS FOR THE MANUFACTURE OF AUTOCLAVE SILICATE PRODUCTS The product of calcination of a gypsum-containing car compressed rock has the following chemical composition in wt.%: CaO, 3-30, / 02 4-15, 1 6 МХО 1 8, and the content of active CaO + MgO - PRI me R s. From the proposed raw mix, a full-bodied silicate brick with a size of 25 x 12 x X 6.5 cm is prepared and products made of cellular concrete in the form of blocks of 35 x 25 x 22 with a weight of LLP kg / m5. The firing duct is used as a binder. of the following composition, in%: CaO - 66.64; MgO - 7.9 O; 16.2 5 5-iO - 6.56; PU Oj- 3.6 with the content of active CaO + MRO - 6O, 7 and CagO 28.14 ,. Grinding of the calcined product is carried out in a mill with a quartz mill.

Sand sand test results to a residue on a N9 OO8 sieve of not more than 1 O%. Subsequently, the products of the proposed mixture are made according to the currently existing technology. The milled product is mixed with aggregate sand (grain size 1з31). The mixture is moistened and kept for hours. Then a brick is formed from the resulting mass. In the manufacture of cheytobethoyn .: blocks, the product of the ground in the aggregate sand with a specific surface of 2200 cm / g VIE is poured into a mixer with water. After two minutes, they are mixed, aluminum powder 11 of the liquid is added, and after 2 minutes, the SPK is rolled into the mold. Pcy-i block forming is vibro technology based. All products are subjected to autoclave treatment for the mode of 3 8 + 3 hours at 8 MPa. The composition of the mixture and the results of tests of products are given in Tabla,

Kv {shich

77.5

14

8.5

eleven

13 76

45 20

35

45 10

45 As can be seen from the table, the physico-physical characteristics of the products from the proposed mixture are significantly superior to the corresponding characteristics of lime-based products. According to the available data with the same consumption of the product of burning and lime (390 kg per 1OOO scht) the strength of a brick in this case is 1.5–2 times higher than the strength of a brick based on lime using the same sand

300

4.7

-5,8

+3.5

ES

39O6.3 368

4.4 +7.0

OOsh58

230 0.130 54 -4.3 T1G Test of autoclaved material for air resistance. they are carried out on vibrated ofz-fenders — 4 x 4 x 16 cm in size, the post-autoclave strength of which was 543 kgf / cm. After 10O cycles of drying and water saturation, the compressive strength is 6.6% higher and, when bent, 9.4% The presence of CaSO4 in the calcining product makes it possible to increase the raw

strength of products from the proposed mixture due to its hydration during the pre-autoclave period

The increase in mechanical strength and morphotic products under autoclave hardening contributes to the & REVOLUTIONAL COMPOUNDS OF THE TYPE SULPHOSULPHIOSILICATES 9 “At the same time, the resulting dementic stone possesses high resistance to air.

Formula vobretevv

1c Raw material for pre-cooked autoclave sprays, including ground sand, sticking into the flooring, characterized in that, in order to increase raw material in post-autoclave strength in frost-resistance products, it contains as a calcined gypsum product of gipso-containing carbon breed c; qpjiefb.

5-50%, with a specific ratio of components in weight,%:

5-70 sand ground calcined gypsum carbonate product po 7-5 About childbirth

placeholder else. 2. Raw material mixture according to claim 1, about tl in- o that the product of the drying of the gypsum-containing carbonate-HY1 ha of the rock has a chemical composition in the air-mass.%: CaO. 55-91, J O. Z-ZO, Sf Og 4-15, 1 6 in MI O 1 8, SCHYa6chem content of active CaO

5 AWt) 35-9OS ,.

Sources of information, the pr1 e in vnvmavne with ekspertzё 1 .Tehivko-ekonomicheskve indicators of the enterprises for the production of slave brick M., 1976,

2. Author's testimony of the USSR

No. 31188О, class, С О4 В 15 / О6, 1968.